Questione giuridica chiave
Whether the clients still owed the remaining architectural fees, including VAT and without WIR payment deduction.
Decisione estratta
The agreed fee was CHF 110,000 in money, with VAT added; after deducting the advances paid, CHF 43,040 remained due.
Motivazione estratta
The lower-court finding that the fee was first CHF 135,000 HT with CHF 13,000 in WIR, then reduced by agreement to CHF 110,000, meant CHF 110,000 net of WIR and therefore VAT still had to be added. The appellants' contrary interpretation was not supported by the factual findings.